tavisrudd/mu — comment on commit 1ff724069d5582de86518ae3f192fb822a04288a
File:  line 0
By tavisrudd:

Actually it looks like (format "%S" nil) and (format "%s" nil) do exactly the same thing, so I misinterpreted some other error with %S I encountered. I sent you the push a few hours after the fact and I can't remember what it was now other than something in the error handling was a bit off. I'll see if I can trigger it again.